No thumbnails in inbox

iOS mail app is not showing any thumbnails from senders in the inbox when the Show Thumbnail option is on. It doesn’t even show the generic sender initials. Is this just how it is and thumbnails just don’t work? I’m using other mail clients connected through Zoho imap and they show the thumbnails of the same senders. Any fix for this?

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Tip #3: Use Check-in to geo-tag your client visits instantly
Hello everyone!We are back with a new tip for this week. In case you missed our previous tip on layout based conversion mapping, you can read about it here. This week's tip goes out to all the sales reps and sales managers out there. Tip #3: Use Check-in to geo-tag your client visits instantly Done with your client visit? Yay! But wait, here comes your next bit of boring yet important things that you do: Call your sales manager and inform him/her that you are done with the meeting. Create/update